[jira] Commented: (LUCENE-2651) Add support for MMapDirectory's unmap in Apache Harmony

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2651?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12910818#action_12910818 ] 

Robert Muir commented on LUCENE-2651:
-------------------------------------

Hi, will test this soon.

Can we apply the 4 changes (MMapII.close(), MMapII.clone(), MultiMMapII.close(), MultiMMapII.clone())  here to both trunk/3x?

I think the defaults issue (LUCENE-2650) should only apply to trunk, but the extra safety is good to go in 3.x
I could then just drop them from my patch over there.

> Add support for MMapDirectory's unmap in Apache Harmony
> -------------------------------------------------------
>
>                 Key: LUCENE-2651
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2651
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>             Fix For: 3.1, 4.0
>
>         Attachments: LUCENE-2651.patch, LUCENE-2651.patch
>
>
> The setUseUnmap does not work on Apache Harmony, this patch adds support for it. It also fixes a small problem, that unmapping a clone may cause a sigsegv.

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